National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Hyannis, Barnstable Municipal-Boardman Airport (KHYA)

Lat: 41.67°NLon: 70.27°WElev: 49ft.

Light Rain Fog

52°F

11°C

Humidity 100%
Wind Speed S 18 G 30 mph
Barometer 29.76 in (1007.8 mb)
Dewpoint 52°F (11°C)
Visibility 0.50 mi
Wind Chill47°F (8°C)
Last update 16 Mar 3:56 pm EDT
Extended Forecast for

South Dennis MA

Flood Watch March 16, 04:02pm until March 17, 08:00am
High Wind Warning March 16, 05:00pm until March 17, 06:00am
Click here for hazard details and duration
Flood Watch
High Wind Warning
  •  
    Flood Watch March 16, 04:02pm until March 17, 08:00am

    NOW until 8:00am Tue

    Flood Watch

  • This Afternoon

    High: 54 °F

    Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: Rain and thunderstorms. Patchy fog. Low around 36. Breezy, with a south wind 17 to 21 mph, with gusts as high as 60 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Rain and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of rain, mainly before 8am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 45. Southwest wind around 15 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Chance Rain
    and Patchy
    Fog then
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 23. West wind around 9 mph, with gusts as high as 21 mph.

    Low: 23 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35. Northwest wind 3 to 7 mph.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 40. Calm wind becoming south 5 to 8 mph in the morning.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 31. Light south wind.

    Low: 31 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
A chance of rain and thunderstorms. Patchy fog. Otherwise, cloudy, with a high near 54. South wind around 16 mph, with gusts as high as 38 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and thunderstorms. Patchy fog. Low around 36. Breezy, with a south wind 17 to 21 mph, with gusts as high as 60 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
A chance of rain, mainly before 8am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 45. Southwest wind around 15 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Partly cloudy, with a low around 23. West wind around 9 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 35. Northwest wind 3 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 26. Calm wind.
Thursday
Mostly sunny, with a high near 40. Calm wind becoming south 5 to 8 mph in the morning.
Thursday Night
Partly cloudy, with a low around 31. Light south wind.
Friday
Mostly sunny, with a high near 44. Southwest wind 5 to 8 mph.
Friday Night
A chance of rain showers between midnight and 5am, then a chance of snow showers after 5am. Mostly cloudy, with a low around 32. Southwest wind around 6 mph. Chance of precipitation is 30%.
Saturday
A chance of rain and snow showers. Partly sunny, with a high near 43. West wind 7 to 11 mph. Chance of precipitation is 40%.
Saturday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 30. North wind around 8 mph becoming south after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Sunday
A chance of rain and snow showers. Partly sunny, with a high near 42. Southwest wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 29. West wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Dennis MA
 41.69°N 70.16°W (Elev. 7 ft)
Last Update:
2:55 pm EDT Mar 16, 2026
Forecast Valid:
4pm EDT Mar 16, 2026-6pm EDT Mar 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation